Portland Firefighters made a somber climb in Monument Square Sunday morning to honor the first responders killed on 9/11.

The firefighters, dressed in full gear, and members of the public climbed the stairs of Monument Square 10 times, a total of 110 flights of stairs. Each climber also carried a picture of one of the 343 New York City Firefighters that were killed when the Twin Towers came down.

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"It honors them by carrying them through the flights of stairs as they did on 9/11," said Portland Fire Department Chief Jerome LaMoria.

Chief LaMoria says the climb also raises awareness of the lingering effects the attacks had on first responders and the entire nation.

"What's really important about this is the effects of 9/11 continue today, and we have hundreds and hundreds of first responders who worked in the aftermath that still suffer effects of that exposure."

Proceeds were donated to the Fallen Firefighter's Foundation, which provides resources and support to the families and colleagues of fallen firefighters.

Sunday's climb was the final event of Portland's 9/11 remembrance ceremonies. The police and fire departments laid a wreath at the 9/11 memorial at Fort Allen Park on Thursday, and also hosted a blood drive.